A crucial step to having any form of future relationship is the acquiring of her mobile/cell phone number. It depends on the situation, if you know she’s going to be where you are such as work, college or school then you don’t have to rush it, just get to know her and some day mention that you’ll text her later about it, if she says ‘ Do you have my number? ‘or ‘ You don’t have my number ! ‘Then reply something similar to ‘Oh yeah (laugh)’ anflirt with womend go from there.
If she’s going to be in a place that you don’t know if she’ll return or you won’t such as a bar or night club then before she leaves, ask if she will be here often, if she will just follow the above and meet her there again, if she won’t then simply ask, ‘Mind if I get your number?